CN101599359B - Special oven used for manufacturing cured epoxy resin dry type transformer coil and manufacturing method thereof - Google Patents
Special oven used for manufacturing cured epoxy resin dry type transformer coil and manufacturing method thereof Download PDFInfo
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- CN101599359B CN101599359B CN2009100388980A CN200910038898A CN101599359B CN 101599359 B CN101599359 B CN 101599359B CN 2009100388980 A CN2009100388980 A CN 2009100388980A CN 200910038898 A CN200910038898 A CN 200910038898A CN 101599359 B CN101599359 B CN 101599359B
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Abstract
The invention provides a special oven used for manufacturing cured epoxy resin dry type transformer coil and a manufacturing method thereof. The top part of the special oven is provided with an exhaust air outlet and an air inlet, wherein, the exhaust air outlet is communicated with an inner chamber of the special oven and the side wall of the special oven is internally provided with an air channel; the air inlet is communicated with one end of the air channel; the air channel is internally provided with an electric heater; the middle lower part of the air channel is provided with an opening which is communicated with the inner chamber; bidirectional shutters are arranged on the opening; the bottom part of the special oven is provided with a base plate; the base plate and the bottom part of the special oven together enclose a lower chamber; the lower chamber is communicated with the other end of the air channel; the base plate is provided with an upturned air-out hole which is communicated with the inner chamber; a pouring mould is arranged on the base plate; the bottom part of the pouring mould is provided with a temperature sensor; a cavity is internally provided with a trolley;the pouring mould and the temperature sensor are arranged on the trolley. The invention is characterized by simple and reasonable structure, easy operation, good cure quality and high production efficiency.
Description
Technical field
The present invention relates to special oven of a kind of coil that is used to make cured epoxy resin dry type transformer and preparation method thereof.
Background technology
A kind of fire retarding epoxide resin thousand formula transformers are disclosed among the Chinese patent literature CN 1060580C, comprise iron core, high-low pressure winding, pours, arm-tie, high pressure train wheel bridge, high pressure lower plate, suspension ring and pin, the electromagnetic wire of high pressure winding, low pressure winding is fixed among the pours of being made up of fire-retardant bisphenol type shrink epoxy resin, flame-proof phenolic type shrink epoxy resin, the stupid acid anhydride of curing agent methyl tetrahydrochysene and the stupid acid anhydride of methyl six hydrogen, and high pressure train wheel bridge, high pressure lower plate are fixed on high and low pressure winding and arm-tie on the iron core in the lump.The baking box of this fire retarding epoxide resin thousand formula transformers adopts electric heating more, and its temperature of emphasizing the oven cavity service area is even.
Because shrinking can appear in its solidification process in epoxy resin, it is big to be that density can become, also can emit heat simultaneously, and the distribution of resin is not uniform in die cavity, when the inner chamber service area of baking box was homogeneous temperature field, the speed of die cavity resin solidification everywhere was not controlled, and the zone of solidifying when the back is not during the top at coil, but then its cure shrinkage can not get from around the replenishing of stir-in resin, shrink hole so produce.These shrink the surface quality that holes gently then influence coil, and are heavy then can cause partial discharge to exceed standard, quite big for the quality influence of coil.
Summary of the invention
Purpose of the present invention aims to provide special oven of a kind of simple and reasonable, easy operating, the curing quality is good, cured epoxy resin dry type transformer is made in high being used to of production efficiency coil and preparation method thereof, to overcome weak point of the prior art.
The special oven that is used to make the coil of cured epoxy resin dry type transformer by this purpose design a kind of, the top that it is characterized in that special oven is provided with exhaust air outlet and air inlet, the exhaust air outlet communicates with the inner chamber of special oven, be provided with the air channel in the sidewall of special oven, air inlet communicates with an end in air channel, be provided with electric heater in the air channel, the middle and lower part in air channel is provided with the opening that communicates with inner chamber, opening is provided with two-way shutter, the bottom of special oven is provided with base plate, the bottom of base plate and special oven surrounds lower chambers jointly, lower chambers communicates with the other end in air channel, and base plate is provided with exhaust vent up, and exhaust vent communicates with inner chamber, water injection molding and be arranged on the base plate, the bottom of watering injection molding is provided with temperature sensor.
Be provided with chassis in the described inner chamber, water injection molding and be placed on the chassis, chassis is placed on the base plate, and temperature sensor is arranged on the chassis, near the position of watering injection molding and can not directly be blown to by air-flow.
Described air channel is arranged on the left and right sides of special oven.
A kind of manufacture method that adopts special oven to make the coil of cured epoxy resin dry type transformer, it is characterized in that the coil of dry-type transformer put into and water in the injection molding, drop into epoxy resin mixing pours in the injection molding toward watering then, then will water injection molding and put into special oven together with coil and epoxy resin mixing pours, from bottom to top in gradient, the temperature that is positioned at the coil of bottom is higher than the temperature of superposed coil to temperature by the special oven control coil in solidification process.
Described epoxy resin mixes pours and comprises bisphenol A type epoxy resin, liquid acid anhydride curing agents and tertiary amine promoter, and the heating and temperature control of special oven is at 80 ℃～140 ℃.
The mass ratio of described bisphenol A type epoxy resin, liquid acid anhydride curing agents and tertiary amine promoter is followed successively by: 100: 100: 0.2～1.0.
Be 20h～40h the heating time of described special oven.
The present invention is directed to the characteristics of epoxy resin cure reaction, when the cured epoxy resin dry type transformer coil, make coil in the special oven service area (being inner chamber) in solidification process, the temperature of control coil from bottom to top in gradient, the temperature of bottom should be higher than the temperature on top, so, the epoxy resin of bottom solidifies earlier, its solidification process carries out from bottom to top, volume contraction in the solidification process of whole winding can obtain replenishing from the flowable epoxy resin on top all the time, thereby suppressed coil inside and the surperficial tendency of shrinking hole that produces in the solidification process, improved and solidify quality.And the reasonable distribution in temperature field in coil during curing also further improves programming rate, accelerates the curing reaction speed of epoxy resin, shortens the curing time of epoxy cast dry transformer coil, enhances productivity.
Cold wind among the present invention is quantitatively blasted the inner chamber of special bake oven jointly from the surrounding air of special bake oven outside by the electric control valve in cold wind blower fan that communicates with air inlet and the air channel; Cold wind enters the inner chamber of special oven through the opening of the middle and lower part by being located at the air channel, heating back in the air channel, opening is provided with two-way used in blinds to regulate the direction of air-out.
Gas extraction system among the present invention is made up of air exhauster, drain tap and the discharge duct etc. that communicate with the exhaust air outlet, in order to discharge the waste gas that produces in the workpiece solidification process.Special oven can be realized automatic vent and manually exhaust, and evacuation time is set as required by the user.When air exhauster turned round, the vent valve of oven interior was opened automatically.When cold wind blasted, air exhauster and drain tap were worked simultaneously, to keep special bake oven pressure inside balance.
The position of the temperature sensor among the present invention is placed in the chassis surface, its objective is to avoid hot blast directly to blow on temperature sensor, cause the temperature control ratio of whole special bake oven difficult, so heat capacity ratio of needs is bigger and put in place fixed-site.
The epoxy resin that uses among the present invention mixes pours as pouring into a mould and generally using during embedding in the Electrical and Electronic industry, therefore, manufacture method provided by the invention not only goes for the coil of dry-type transformer, but also go for other components and parts of Electrical and Electronic industry, have the bigger scope of application.
That the present invention has is simple and reasonable, easy operating, the curing quality is good, production efficiency is high characteristics.
Description of drawings
Fig. 1 is the sectional structure schematic diagram of the special oven in one embodiment of the invention.
Fig. 2 is that A-A among Fig. 1 is to the sectional structure schematic diagram.
Embodiment
Below in conjunction with drawings and Examples the present invention is further described.
Referring to Fig. 1-Fig. 2, originally be used to make the special oven of the coil of cured epoxy resin dry type transformer, the top of special oven is provided with exhaust air outlet 1 and air inlet 2, exhaust air outlet 1 communicates with the inner chamber of special oven, be respectively arranged with air channel 3 about special oven in two sidewalls, air inlet 2 communicates with an end in air channel 3, is provided with electric heater 4 in the air channel 3, the middle and lower part in air channel 3 is provided with the opening that communicates with inner chamber, and opening is provided with two-way shutter 5.The bottom of special oven is provided with base plate 7, and the bottom of base plate and special oven surrounds lower chambers jointly, and lower chambers communicates with the other end in air channel 3, and base plate 7 is provided with exhaust vent 7.1 up, and exhaust vent communicates with inner chamber; Be provided with chassis 8 in the inner chamber, water injection molding 6 and be placed on the chassis 8, chassis is placed on the base plate 7; Temperature sensor is arranged on the chassis 8, near the position of watering injection molding 6 and can not directly be blown to by air-flow, its objective is in order to reduce the influence of gas flow temperature sensor thermometric accuracy.The outer wall of special oven is provided with heat-insulation layer 10, and among the figure, 11 is door.
Certainly, the chassis in the present embodiment also can omit, and directly will water injection molding with the device of migrating and be passed on the base plate in the special oven, treat that its baking finishes after, will water injection molding with the device of migrating again and remove from the base plate of special oven and get final product.
When adopting above-mentioned special oven to make the coil of cured epoxy resin dry type transformer, the coil of dry-type transformer put into water in the injection molding 6, drop into epoxy resin mixing pours in the injection molding toward watering then, then will water injection molding is placed on the chassis together with coil and epoxy resin mixing pours, then chassis is sent in the special oven, from bottom to top in gradient, the temperature that is positioned at the coil of bottom is higher than the temperature of superposed coil to temperature by the special oven control coil in solidification process.
Wherein, epoxy resin mixes pours and comprises bisphenol A type epoxy resin, liquid acid anhydride curing agents and tertiary amine promoter, the heating and temperature control of special oven is at 80 ℃～140 ℃, and the mass ratio of bisphenol A type epoxy resin, liquid acid anhydride curing agents and tertiary amine promoter is followed successively by: 100: 100: 0.2～1.0.Be controlled in 10h～40h the heating time of whole special oven., be controlled at its heating time 8～10 hours 80 ℃ the time as the heating and temperature control of special oven; The heating and temperature control of special oven was controlled at 10～14 hours in the time of 140 ℃ its heating time.
Claims (6)
1. special oven that is used to make the coil of cured epoxy resin dry type transformer, the top that it is characterized in that special oven is provided with exhaust air outlet (1) and air inlet (2), the exhaust air outlet communicates with the inner chamber of special oven, be provided with air channel (3) in the sidewall of special oven, air inlet communicates with an end of air channel (3), be provided with electric heater (4) in the air channel, the middle and lower part in air channel is provided with the opening that communicates with inner chamber, opening is provided with two-way shutter (5), the bottom of special oven is provided with base plate (7), the bottom of base plate and special oven surrounds lower chambers jointly, lower chambers communicates with the other end in air channel, base plate is provided with exhaust vent (7.1) up, and exhaust vent communicates with inner chamber; Be provided with chassis (8) in the described inner chamber, water injection molding (6) and be placed on the chassis, chassis is placed on the base plate; Temperature sensor is arranged on the chassis, near the position of watering injection molding and can not directly be blown to by air-flow.
2. the special oven that is used to make the coil of cured epoxy resin dry type transformer according to claim 1 is characterized in that described air channel (3) is arranged on the left and right sides of special oven.
3. manufacture method that adopts special oven as claimed in claim 1 to make the coil of cured epoxy resin dry type transformer, it is characterized in that the coil of dry-type transformer put into and water in the injection molding (6), drop into epoxy resin mixing pours in the injection molding toward watering then, then will water injection molding and put into special oven together with coil and epoxy resin mixing pours, from bottom to top in gradient, the temperature that is positioned at the coil of bottom is higher than the temperature of superposed coil to temperature by the special oven control coil in solidification process.
4. employing special oven according to claim 3 is made the manufacture method of the coil of cured epoxy resin dry type transformer, it is characterized in that described epoxy resin mixes pours and comprises bisphenol A type epoxy resin, liquid acid anhydride curing agents and tertiary amine promoter, the heating and temperature control of special oven is at 80 ℃～140 ℃.
5. employing special oven according to claim 4 is made the manufacture method of the coil of cured epoxy resin dry type transformer, it is characterized in that the mass ratio of described bisphenol A type epoxy resin, liquid acid anhydride curing agents and tertiary amine promoter is followed successively by: 100: 100: 0.2～1.0.
6. employing special oven according to claim 4 is made the manufacture method of the coil of cured epoxy resin dry type transformer, and be 20h～40h the heating time that it is characterized in that described special oven.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100388980A CN101599359B (en) | 2009-04-22 | 2009-04-22 | Special oven used for manufacturing cured epoxy resin dry type transformer coil and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100388980A CN101599359B (en) | 2009-04-22 | 2009-04-22 | Special oven used for manufacturing cured epoxy resin dry type transformer coil and manufacturing method thereof |
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| Publication Number | Publication Date |
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| CN101599359A CN101599359A (en) | 2009-12-09 |
| CN101599359B true CN101599359B (en) | 2011-09-07 |
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| CN2009100388980A Active CN101599359B (en) | 2009-04-22 | 2009-04-22 | Special oven used for manufacturing cured epoxy resin dry type transformer coil and manufacturing method thereof |
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Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101749929A (en) * | 2010-01-20 | 2010-06-23 | 常州亿晶光电科技有限公司 | Special baking oven for silicon material |
| CN101749928A (en) * | 2010-01-20 | 2010-06-23 | 常州亿晶光电科技有限公司 | Special baking oven and special movable material rack thereof for silicon material |
| CN101837617B (en) * | 2010-04-15 | 2012-10-03 | 上海凯利电器厂有限公司 | Gel curing processing method of epoxy resin |
| CN103111950B (en) * | 2012-11-13 | 2014-12-31 | 湖北天马研磨材料有限公司 | High-quality curing process method for abrasive paper volume |
| WO2014078132A2 (en) * | 2012-11-15 | 2014-05-22 | W.C. Bradley Co. | Electric roaster and smoker |
| CN104467322B (en) * | 2013-09-17 | 2016-09-21 | 山东欧瑞安电气有限公司 | A kind of poured with epoxy resin technique of motor stator winding |
| CN104482763A (en) * | 2014-12-21 | 2015-04-01 | 湖北华夏窑炉工业(集团)有限公司 | Product effective loading space for SCR plate-type catalyst continuous vertical calcining furnace |
| CN109304831A (en) * | 2017-07-29 | 2019-02-05 | 江苏宏景电气有限公司 | Baking oven and gel method for mold gel |
| CN110993330B (en) * | 2019-10-31 | 2021-06-22 | 广州市一变电气设备有限公司 | Manufacturing method of transformer coil and oven device |
| CN113012926B (en) * | 2021-02-18 | 2022-09-02 | 悉瑞绿色电气(苏州)有限公司 | Method for removing residual gas of encapsulated insulated winding |
| CN115008659A (en) * | 2022-06-10 | 2022-09-06 | 大连北方互感器集团有限公司 | Repair-free process for epoxy resin vacuum pouring gate |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU813103A1 (en) * | 1979-04-20 | 1981-03-15 | Предприятие П/Я В-2595 | Furnace for heat teatment of articles |
| CN2075766U (en) * | 1989-12-31 | 1991-04-24 | 冶金工业部金属制品研究院 | Heating stove for plastic painting production line on metal |
| US5567151A (en) * | 1994-10-21 | 1996-10-22 | Senju Metal Industry Company Limited | Reflow furnaces with hot air blow type heaters |
-
2009
- 2009-04-22 CN CN2009100388980A patent/CN101599359B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU813103A1 (en) * | 1979-04-20 | 1981-03-15 | Предприятие П/Я В-2595 | Furnace for heat teatment of articles |
| CN2075766U (en) * | 1989-12-31 | 1991-04-24 | 冶金工业部金属制品研究院 | Heating stove for plastic painting production line on metal |
| US5567151A (en) * | 1994-10-21 | 1996-10-22 | Senju Metal Industry Company Limited | Reflow furnaces with hot air blow type heaters |
Non-Patent Citations (1)
| Title |
|---|
| JP昭59-77289A 1984.05.02 |
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Owner name: SUNTEN-AREVA ELECTRIC CO. LTD Free format text: FORMER OWNER: SUNTEN ELECTRIC CO., LTD. Effective date: 20100416 |
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Effective date of registration: 20100416 Address after: 528300 Guangdong Province, Foshan city Shunde District Daliang Honggang Industrial Zone Applicant after: Areva-Sunten Electric Co., Ltd. Address before: 528300 Guangdong Province, Foshan city Shunde District Daliang Honggang Industrial Zone Applicant before: Sunten Electric Co., Ltd. |
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